The following is an excerpt from our report:
The following calculations will ignore the 50% of villagers who are connected and pay for grid power. Assuming each household has two batteries, an average battery which looks about the same size as one in the pictures provided by EWB has a capacity of 720 watt-hours (Wh). Assuming each household has two batteries, this means there is approximately 39 kWh of batteries to charge. Radios, the primary communication method in Pu Ngaol, last 3 days and two nights per charge. A similar model of radio has a battery capacity of 13.5 Wh. Assuming two thirds of the villagers have a radio, there is around 2.5 kWh in radio batteries to charge. In total, there is around 41.5 kWh of batteries to charge each day.
Lachlan Lau